require 'spec_helper'

require 'hamster/hash'

describe Hamster::Hash do

  describe "#put" do

    before do
      @original = Hamster.hash("A" => "aye", "B" => "bee", "C" => "see")
    end

    describe "with a block" do

      it "passes the value to the block" do
        @original.put("A") { |value| value.should == "aye" }
      end

      it "replaces the value with the result of the block" do
        result = @original.put("A") { |value| "FLIBBLE" }
        result.get("A").should == "FLIBBLE"
      end

      it "supports to_proc methods" do
        result = @original.put("A", &:next)
        result.get("A").should == "ayf"
      end

    end

    describe "with a unique key" do

      before do
        @result = @original.put("D", "dee")
      end

      it "preserves the original" do
        @original.should == Hamster.hash("A" => "aye", "B" => "bee", "C" => "see")
      end

      it "returns a copy with the superset of key/value pairs" do
        @result.should == Hamster.hash("A" => "aye", "B" => "bee", "C" => "see", "D" => "dee")
      end

    end

    describe "with a duplicate key" do

      before do
        @result = @original.put("C", "sea")
      end

      it "preserves the original" do
        @original.should == Hamster.hash("A" => "aye", "B" => "bee", "C" => "see")
      end

      it "returns a copy with the superset of key/value pairs" do
        @result.should == Hamster.hash("A" => "aye", "B" => "bee", "C" => "sea")
      end

    end

  end

end